The definition of fibromyalgia was recently amended with particular consideration of cognitive and somatic symptoms, factors not involved in the initial criteria of the ACR classification. Several factors are in favor of a malfunction of the central modulation of pain and poorer performance noxious inhibitory controls descendants (DNIC: diffuse noxious inhibitory controls) have been demonstrated. In fibromyalgia patients, the DNIC (diffuse noxious inhibitory controls) are altered with less pain inhibition than controls. Dysfunction of the central pain modulation is widely described in the literature and contributes to pain complained of fibromyalgia.